1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/*
* Copyright 2017-2022 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
package kotlinx.serialization.json
import kotlinx.serialization.*
import kotlinx.serialization.json.internal.*
import kotlinx.serialization.json.okio.decodeFromBufferedSource
import kotlinx.serialization.json.okio.encodeToBufferedSink
import kotlinx.serialization.modules.EmptySerializersModule
import kotlinx.serialization.modules.SerializersModule
import kotlinx.serialization.test.*
import kotlin.test.assertEquals
import okio.*
import kotlin.test.assertTrue
enum class JsonTestingMode {
STREAMING,
TREE,
OKIO_STREAMS,
JAVA_STREAMS;
companion object {
fun value(i: Int) = values()[i]
}
}
abstract class JsonTestBase {
protected val default = Json { encodeDefaults = true }
protected val lenient = Json { isLenient = true; ignoreUnknownKeys = true; allowSpecialFloatingPointValues = true }
internal inline fun <reified T : Any> Json.encodeToString(value: T, jsonTestingMode: JsonTestingMode): String {
val serializer = serializersModule.serializer<T>()
return encodeToString(serializer, value, jsonTestingMode)
}
internal fun <T> Json.encodeToString(
serializer: SerializationStrategy<T>,
value: T,
jsonTestingMode: JsonTestingMode
): String =
when (jsonTestingMode) {
JsonTestingMode.STREAMING -> {
encodeToString(serializer, value)
}
JsonTestingMode.JAVA_STREAMS -> {
encodeViaStream(serializer, value)
}
JsonTestingMode.TREE -> {
val tree = writeJson(this, value, serializer)
encodeToString(tree)
}
JsonTestingMode.OKIO_STREAMS -> {
val buffer = Buffer()
encodeToBufferedSink(serializer, value, buffer)
buffer.readUtf8()
}
}
internal inline fun <reified T : Any> Json.decodeFromString(source: String, jsonTestingMode: JsonTestingMode): T {
val deserializer = serializersModule.serializer<T>()
return decodeFromString(deserializer, source, jsonTestingMode)
}
internal fun <T> Json.decodeFromString(
deserializer: DeserializationStrategy<T>,
source: String,
jsonTestingMode: JsonTestingMode
): T =
when (jsonTestingMode) {
JsonTestingMode.STREAMING -> {
decodeFromString(deserializer, source)
}
JsonTestingMode.JAVA_STREAMS -> {
decodeViaStream(deserializer, source)
}
JsonTestingMode.TREE -> {
val tree = decodeStringToJsonTree(this, deserializer, source)
readJson(this, tree, deserializer)
}
JsonTestingMode.OKIO_STREAMS -> {
val buffer = Buffer()
buffer.writeUtf8(source)
decodeFromBufferedSource(deserializer, buffer)
}
}
protected open fun parametrizedTest(test: (JsonTestingMode) -> Unit) {
processResults(buildList {
add(runCatching { test(JsonTestingMode.STREAMING) })
add(runCatching { test(JsonTestingMode.TREE) })
add(runCatching { test(JsonTestingMode.OKIO_STREAMS) })
if (isJvm()) {
add(runCatching { test(JsonTestingMode.JAVA_STREAMS) })
}
})
}
private inner class SwitchableJson(
val json: Json,
val jsonTestingMode: JsonTestingMode,
override val serializersModule: SerializersModule = EmptySerializersModule()
) : StringFormat {
override fun <T> encodeToString(serializer: SerializationStrategy<T>, value: T): String {
return json.encodeToString(serializer, value, jsonTestingMode)
}
override fun <T> decodeFromString(deserializer: DeserializationStrategy<T>, string: String): T {
return json.decodeFromString(deserializer, string, jsonTestingMode)
}
}
protected fun parametrizedTest(json: Json, test: StringFormat.() -> Unit) {
val streamingResult = runCatching { SwitchableJson(json, JsonTestingMode.STREAMING).test() }
val treeResult = runCatching { SwitchableJson(json, JsonTestingMode.TREE).test() }
val okioResult = runCatching { SwitchableJson(json, JsonTestingMode.OKIO_STREAMS).test() }
processResults(listOf(streamingResult, treeResult, okioResult))
}
protected fun processResults(results: List<Result<*>>) {
results.forEachIndexed { i, result ->
result.onFailure {
println("Failed test for ${JsonTestingMode.value(i)}")
throw it
}
}
for (i in results.indices) {
for (j in results.indices) {
if (i == j) continue
assertEquals(
results[i].getOrNull()!!,
results[j].getOrNull()!!,
"Results differ for ${JsonTestingMode.value(i)} and ${JsonTestingMode.value(j)}"
)
}
}
}
/**
* Same as [assertStringFormAndRestored], but tests both json converters (streaming and tree)
* via [parametrizedTest]
*/
internal fun <T> assertJsonFormAndRestored(
serializer: KSerializer<T>,
data: T,
expected: String,
json: Json = default
) {
parametrizedTest { jsonTestingMode ->
val serialized = json.encodeToString(serializer, data, jsonTestingMode)
assertEquals(expected, serialized, "Failed with streaming = $jsonTestingMode")
val deserialized: T = json.decodeFromString(serializer, serialized, jsonTestingMode)
assertEquals(data, deserialized, "Failed with streaming = $jsonTestingMode")
}
}
/**
* Same as [assertStringFormAndRestored], but tests both json converters (streaming and tree)
* via [parametrizedTest]. Use custom checker for deserialized value.
*/
internal fun <T> assertJsonFormAndRestoredCustom(
serializer: KSerializer<T>,
data: T,
expected: String,
check: (T, T) -> Boolean
) {
parametrizedTest { jsonTestingMode ->
val serialized = Json.encodeToString(serializer, data, jsonTestingMode)
assertEquals(expected, serialized, "Failed with streaming = $jsonTestingMode")
val deserialized: T = Json.decodeFromString(serializer, serialized, jsonTestingMode)
assertTrue("Failed with streaming = $jsonTestingMode\n\tsource value =$data\n\tdeserialized value=$deserialized") { check(data, deserialized) }
}
}
}
|
